Range actions are not supported Exception

[milos12345]

I replaced my ObservableCollection with this one and I get

System.NotSupportedException: 'Range actions are not supported.'

on line

OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, changedItems, startIndex));

Using WPF and .NET 4.8. Am I missing something?

Edit: more info:

Stack Trace

at System.Windows.Data.ListCollectionView.ValidateCollectionChangedEventArgs(NotifyCollectionChangedEventArgs e)
at System.Windows.Data.ListCollectionView.ProcessCollectionChanged(NotifyCollectionChangedEventArgs args)
at System.Collections.ObjectModel.ObservableCollection1.OnCollectionChanged(NotifyCollectionChangedEventArgs e) at System.Collections.ObjectModel.RangedObservableCollection1.AddRange(IEnumerable`1 collection) in D:...\RangedObservableCollection.cs:line

when I try

List<object> templist = new List<object>();
...
FilesCollection.AddRange(templist);

[PieterjanDeClippel]

I've been able to fix this like this: MintPlayer/MintPlayer.Dotnet.Tools@3c4a0ea

Basically, you cannot call OnCollectionChanged because that would trigger a Range operation.

What you can do instead is loop through all handlers. If the handler is bound from a CollectionView, you can just call the Refresh() method on the CollectionView. Otherwise you can just invoke the handler.